Defoe was again on the scoresheet in the triumph.
He has now scored five goals in as many games and he told ITV 4: "When you play with good players they will always create chances for the forwards to score."
He added: "It's been good - not just me and Ade (Emmanuel Adebayor) - I think everyone played their part.
"Hopefully we can keep it going - it was a good victory. Everyone wants to do well in the competition - we want to win it.
"Now we've got an important game at the weekend against Everton, a great side."